在Swift 4的左侧/右侧的UITextField中添加图标或图像 [英] Add icon or image in UITextField on left / right in Swift 4
本文介绍了在Swift 4的左侧/右侧的UITextField中添加图标或图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我已经在UITextField
中设置了左侧图标.设置文字时,它位于左侧的图标上方.我想在UITextField
中的图标之后设置文本.我已经使用了下面的代码.
I have set up the left icon in UITextField
. When I set text, it is over the left icon. I want to set text after the icon in the UITextField
. I have used below code.
let imageView = UIImageView(image: UIImage(named: strImgname))
imageView.frame = CGRect(x: 0, y: 0, width: imageView.image!.size.width , height: imageView.image!.size.height)
let paddingView: UIView = UIView.init(frame: CGRect(x: 0, y: 0, width: 50, height: 30))
paddingView.addSubview(imageView)
txtField.leftViewMode = .always
txtField.leftView = paddingView
推荐答案
您可以使用@IBDesignable
来制作具有这些功能甚至更多功能的可设计UITextField
,并在整个项目中使用它.
You can use @IBDesignable
to make a designable UITextField
with these capabilities and even more and use it through out your project.
具有Delegate方法的DesignableTextField:
import Foundation
import UIKit
protocol DesignableTextFieldDelegate: UITextFieldDelegate {
func textFieldIconClicked(btn:UIButton)
}
@IBDesignable
class DesignableTextField: UITextField {
//Delegate when image/icon is tapped.
private var myDelegate: DesignableTextFieldDelegate? {
get { return delegate as? DesignableTextFieldDelegate }
}
@objc func buttonClicked(btn: UIButton){
self.myDelegate?.textFieldIconClicked(btn: btn)
}
//Padding images on left
override func leftViewRect(forBounds bounds: CGRect) -> CGRect {
var textRect = super.leftViewRect(forBounds: bounds)
textRect.origin.x += padding
return textRect
}
//Padding images on Right
override func rightViewRect(forBounds bounds: CGRect) -> CGRect {
var textRect = super.rightViewRect(forBounds: bounds)
textRect.origin.x -= padding
return textRect
}
@IBInspectable var padding: CGFloat = 0
@IBInspectable var leadingImage: UIImage? { didSet { updateView() }}
@IBInspectable var color: UIColor = UIColor.lightGray { didSet { updateView() }}
@IBInspectable var imageColor: UIColor = UIColor.init(hex: "3EB2FF") { didSet { updateView() }}
@IBInspectable var rtl: Bool = false { didSet { updateView() }}
func updateView() {
rightViewMode = UITextFieldViewMode.never
rightView = nil
leftViewMode = UITextFieldViewMode.never
leftView = nil
if let image = leadingImage {
let button = UIButton(type: .custom)
button.frame = CGRect(x: 0, y: 0, width: 20, height: 20)
let tintedImage = image.withRenderingMode(.alwaysTemplate)
button.setImage(tintedImage, for: .normal)
button.tintColor = imageColor
button.setTitleColor(UIColor.clear, for: .normal)
button.addTarget(self, action: #selector(buttonClicked(btn:)), for: UIControlEvents.touchDown)
button.isUserInteractionEnabled = true
if rtl {
rightViewMode = UITextFieldViewMode.always
rightView = button
} else {
leftViewMode = UITextFieldViewMode.always
leftView = button
}
}
// Placeholder text color
attributedPlaceholder = NSAttributedString(string: placeholder != nil ? placeholder! : "", attributes:[NSAttributedStringKey.foregroundColor: color])
}
}
现在可以在情节提要中按如下所示对其进行设计:
注意::Rtl
设置为Off
时,图标将移到UITextField
NOTE: Rtl
when set to Off
icon will move to left of UITextField
在所需的ViewController中符合委托.
class MyViewController: UIViewController, DesignableTextFieldDelegate {
@IBOutlet weak var txtFieldSomeSearch: DesignableTextField!
txtFieldSomeSearch.delegate = self // can be done in storyboard as well
... // other codes
func textFieldIconClicked(btn: UIButton) {
print("MyViewController : textFieldIconClicked")
}
... // other codes
}
最终输出:
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